Murdoch's - Wildology Logo Ball 2.5" Mesh Bag 12 PK. These are the first tennis ball designed specifically for dogs. Petsport has sold these industry leading balls for over 20 years. The 2.5" Murdoch's Balls have super thick natural rubber walls for extra durability and better bounce. Murdoch's Balls uses polyester felt on the outside of the ball making it safe on dogs teeth. Whereas regular tennis balls uses wool felt which is harmful and can wear a dogs teeth down. Murdoch's 2.5" Balls are non-toxic and are safe for dogs and the children that play with them. | Pet Sport Murdoch Tennis Ball 12 Pack in Orange | Size 2.5"